my signal is just fine. Internal antenna?? the housing doesn't come with and parts in the inside. Not sure what you mean by internal antenna unless your talking about the long silver piece on the side (in the inside), I had just taken what was on my old casing and popped it into the new one. Did you change the housing yet? Some people had difficulty with the vibrator when spinning. They thought shaving the inside would work but it didn't work for me. They ended up using the double sided tape like I did.